Drill-sleeve.



No. 768,186.- PATENTED AUG. 23, 1904. R. A. LACHMANN.

DRILL SLEEVE.

APPLICATION FILED MAB. 25, 1903. N0 MODEL.

FI G I.

Unsung UNITED STATES Patented August 23, i904.

PATENT OEEICE.

DRILL-SLEEVE.

SPECIFICATION forming part of Letters Iatent N o. 768,186, dated August23, 1904.

Application iled March 25, 1903.

.To @ZZ whom it may concern:

Be it known that I, ROBERT A. LACHMANN, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented new and useful Improvements in Drill-Sleeves, offwhich thefollowing is a specification.

My invention has relation to new and useful Improvements intool-holders, and v more especially to those of that character or typewhich are socketed to receive the shank of a tool and adapted to benested together in order that tools of different sizes may be used withthe same machine press or spindle.

One' of the'objects of the invention is to provide a tool-holder of thecharacter mentionedwhich is so constructed that when-in operativeposition in a machine-spindle the tool may be. removed therefrom withoutthe necessity of dislodging the holder and subsequently by a v withoutremoving all the holders from the machine and then separating them oneat a time.

The invention consists in providing a plurality of socketed tool-holdersof different sizes, each having an opening in its walls, said holdersbeing constructed to beV nested together and the openings in their wallsbeing so shaped and arranged as to overlap, so that a drift-pin or otherdriving-tool may be inserted through the wall of the larger'holder andhave access to the socket of the smaller nested holder'. l l

I have fullyI and clearly illustrated my invention in the accompanyingdrawings, forming a part of this specification. and wherein- Figure lisa view in side elevation of the tool-holders of diiferent sizes nestedtogether in operative relation to carry a drill or other tool. Fig. 2 isa view in frontV elevation of the tool-holders nested together andshowing the Serial No. 149,565. (Nofmodel.)

structed to embody my invention, 1 designates a.tapered drill-sleevehaving a tang 2 at its upper or reduced end and provided vwith'a shortlongitudinally-extending slot 3 adjacent said tang, said sleeve beingalso provided with a `longitudinally-extending tapered -socket adaptedto receive the shank end ofa drill or other tool.

The above features of construction are similartoI devices of thischaracter which have ordinarily been used and form no part of myinvention. I, however, have improved. upon the construction justmentioned by providing each sleeve or holder with alongitudinallyextending slot 4in each side wall thereof andin alinementwith the slots 3 and which extend for a major portion of the lengthofthe socket in the sleeve and opening therein,` said slotsbeing solocated as to permit lateral access of a drift-pin or similardriving-tool tosubstantially any point in the length of the socket.

The edges of these slots are rounded, as shown clearly in Fig. 7, and inthe larger size of sleeves the slots I are preferably approximatelytwice the length of the smaller ordinary slots 3; but it will beunderstood that the length of the slot 4 in each sleeve depends vuponthe length of its socket and upon the lengths of the slots in thesleeves to be nested in said socket. The sleeves in the series, aspreviously indicated, areV of different sizes,

the smallest one, 5, being provided with but a single slot 6 in eachside. The next largest sleeve of the series used has two slots 7 and 8in each side, said slots being of the same length. The larger sleeves,however, as before stated, have the two sets of slots formed ofdifferent lengths. i

If it is desired to place into a large drill- IOO press a drill the tangor shank of Which is too small to be seated in the socket of thedrill-press, a number of the sleeves or holders are nested in the pressuntil the last one is of the proper size to receive the drill. Saiddrill 9 is inserted into the sleeve, and when in position therein thetang l() of the drill will appear in position between the slots 6 ofsleeve 5, the slot 8 of the next largest sleeve, which is illustrated inFig 5, and the slot in the second sleeve in the nested series above thesleeve 5.) The tang 11 of sleeve 5 will be accessible through the slotsin the third and fourth sleeves in the series or the second and thirdabove the sleeve 5, and the tangs of the other sleeves will also beaccessible through the slots of the larger sleeves, arranged thereon ina similar manner.` When the parts are assembled in this manner and asillustrated in Figs. l, 2, and 3, the drill can be quickly removed forsharpening or other purposes by inserting a drift l2 into theregistering slots of the first three sleeves in the series, so as tobear downward upon the tang of the drill, and when said drift is forcedinward the drill be ejected Without first going to the trouble ofremoving the sleeves one from the other. Should it be desired to place alarger-size drill within the press, the drift can be placed above thetang of the sleeve which it is desired to remove, and said sleeve canthus be readily forced outward Without detaching the remaining sleevesfrom each other, thereby saving time and reducing Wear upon the parts.

It will be seen from the foregoing description, taken in connection withthe drawings, that beginning' With the smallest sleeve any requirednumber of the sleeves may be removed from their operative positionWithout affecting those immediately above in the series by simplydriving the drift into the slot above the tang of the last sleeve to beremoved and that the entire series may be removed by inserting the driftin the uppermost slot, which, as shown in the drawings, is slot 3.

By rounding the edges of the slots the same will be prevented frombecoming nicked or otherwise injured by metal tools coming in contacttherewith.

It will be seen that in using the drift the same always has a bearing inthe upper end of the slot of the sleeve in which tlu` tang to beoperated upon is located, and it does not'. bear on any of the othersleeves during such operation, the openings in the latter merely servingto give access to the slot of the lsleeve which carries the sleeve ortool to be removed.

It will be understood that various combinations of the sleeves can beused in order to obtain desired results, and in all cases the slots areso arranged that the tangs of the several sleeves will be in a positioneasily accessible for removal by means of the drift.

ln the foregoing description l have shown the preferred form of myinvention; butl do not limit myself thereto, as ,l am aware thatmodilications may be made therein without departing from the spirit orsacrificing any of the advantages thereof, and vl therefore reserve theright to make such changes as fairly fall within the scope of myinvention.

Having` thus fully described the invention, what is claimed as newis4 1. Aplurality of taper-socketed tool-holders of different sizesnested together, and having transverse openings through their walls soshaped and disposed as to overlap, whereby to give access with adrift-pin to the socket of a smaller nested holder through the wall ofthe larger holder.

2. A tool-holding device having a tapered tool-socket and having itswall open laterally throughout the major portion of the length of thesocket so as to permit lateral access ol a drift-pin or otherdriving-tool to substantially any point in its length.

In testimony whereof l ailix my signature in presence of two witnesses.

ROBERT A. LACllMANN.

Witnesses:

HUGO lULvnu, H. R'. Asn.

